Haberkasten was rosh yeshiva in Lviv, and was later the first rabbi of the city of Ostroh, Volhynia. He left Ostroh to assume the position of rosh yeshiva in Brest and Luria succeeded him in Ostroh. Haberkasten then went to Eretz Yisroel, in about 1560.
- This article incorporates text from a publication now in the public domain: Singer, Isidore; et al., eds. (1901–1906). "Haberkasten, Kalman (Kalonymus)". Jewish Encyclopedia. New York: Funk & Wagnalls Company.